\begin{tabular}{l*{8}{c}} \hline \hline \noalign{\smallskip} 
		& \multirow{5}{*}{\shortstack{GDP per\\worker (\$)}} & \multicolumn{2}{c}{\shortstack{Colleges}} & \multicolumn{2}{c}{\shortstack{Graduates}} & \multicolumn{3}{c}{\shortstack{Average selection estimate}}  \\
		 \cmidrule(l){3-4}  \cmidrule(l){5-6} \cmidrule(l){7-9}
		Country &  & Overall & \shortstack{Top\\Colleges} & Overall & \shortstack{Top\\Colleges} & Overall & \shortstack{Top\\Colleges} & \shortstack{Non-top\\Colleges} \\
\hline \noalign{\smallskip}
India& 16,717& 32& 10& 657& 228& -0.08& -0.15& -0.04\\
Nigeria& 17,667& 18& 4& 946& 371& 0.43& 0.41& 0.45\\
Philippines& 18,688& 13& 1& 2963& 518& -0.05& 0.00& -0.06\\
China& 24,021& 70& 34& 298& 170& 0.10& 0.15& 0.02\\
Colombia& 29,652& 15& 3& 51& 16& 0.22& 0.41& 0.14\\
South Africa& 49,487& 13& 2& 333& 101& 0.19& 0.00& 0.27\\
Poland& 64,492& 19& 10& 810& 527& 0.31& 0.36& 0.22\\
South Korea& 75,315& 27& 6& 185& 113& 0.05& 0.03& 0.09\\
New Zealand& 77,746& 7& 1& 730& 290& -0.03& 0.00& -0.04\\
Japan& 78,979& 20& 13& 63& 46& 0.02& 0.04& -0.06\\
United Kingdom& 91,426& 119& 12& 8382& 1056& 0.03& -0.09& 0.04\\
Australia& 95,421& 39& 4& 1039& 245& 0.00& 0.03& -0.01\\
Netherlands& 105,262& 12& 3& 89& 29& -0.09& -0.04& -0.11\\
Italy& 109,005& 31& 3& 94& 37& 0.35& 0.27& 0.41\\
United States& 124,587& 1484& 96& 133525& 37915& 0.03& 0.02& 0.04\\
Singapore& 154,262& 5& 0& 530& 0& -0.10& --& -0.10\\
Ireland& 160,814& 16& 2& 727& 169& -0.02& -0.03& -0.01\\
 \hline \hline \noalign{\smallskip}
\end{tabular}